Replace C++ bitfields with our own BitFields

src/profile-generator-inl.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PROFILE_GENERATOR_INL_H_
 #define V8_PROFILE_GENERATOR_INL_H_
 
 #include "src/profile-generator.h"
 
 namespace v8 {
 namespace internal {
 
-CodeEntry::CodeEntry(Logger::LogEventsAndTags tag,
-                     const char* name,
-                     const char* name_prefix,
-                     const char* resource_name,
-                     int line_number,
-                     int column_number)
-    : tag_(tag),
-      builtin_id_(Builtins::builtin_count),
+CodeEntry::CodeEntry(Logger::LogEventsAndTags tag, const char* name,
+                     const char* name_prefix, const char* resource_name,
+                     int line_number, int column_number)
+    : bit_field_(TagField::encode(tag) |
+                 BuiltinIdField::encode(Builtins::builtin_count)),
       name_prefix_(name_prefix),
       name_(name),
       resource_name_(resource_name),
       line_number_(line_number),
       column_number_(column_number),
       shared_id_(0),
       script_id_(v8::UnboundScript::kNoScriptId),
       no_frame_ranges_(NULL),
-      bailout_reason_(kEmptyBailoutReason) { }
+      bailout_reason_(kEmptyBailoutReason) {}
 
 
 bool CodeEntry::is_js_function_tag(Logger::LogEventsAndTags tag) {
   return tag == Logger::FUNCTION_TAG
       || tag == Logger::LAZY_COMPILE_TAG
       || tag == Logger::SCRIPT_TAG
       || tag == Logger::NATIVE_FUNCTION_TAG
       || tag == Logger::NATIVE_LAZY_COMPILE_TAG
       || tag == Logger::NATIVE_SCRIPT_TAG;
 }
 
 
 ProfileNode::ProfileNode(ProfileTree* tree, CodeEntry* entry)
     : tree_(tree),
       entry_(entry),
       self_ticks_(0),
       children_(CodeEntriesMatch),
       id_(tree->next_node_id()) { }
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_INL_H_